Gas-burner



(No Model.)

W. DAWSON.

GAS BURNER.

No. 433,675. Patented Aug. 5, 1890.

WITNES? INVENTOR UNITED STATES PATENT OFFICE.

WILLIAM DAVYSON, OF OGONTZ, PENNSYLVANIA.

GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 433,675, dated August5, 1890.

Serial No. 354,459. (No model.)

To all whom it 11mg concern.-

Be it known that 1, WILLIAM DAWSON, of Ogontz, in the county ofMontgomery, State of Pennsylvania, have invented certain new and usefulImprovements inGas-Burners, of which the following is a specification,reference being had to the accompanying drawings.

My invention has special reference to gasbnrners intended for use uponrailway-cars or under similarly-exposed conditions; and its object is toassist in maintaininga steady flame unaffected by local currents of air.

Minor features of consideration adapted for use in connection with suchfixtures as are now commonly found in railway-cars where gas orcarbureted vapor is employed may be used, so that but little change isrequired to accommodate my improved burner to existing plants.

In the drawings I have shown the burner as applied to what is commonlycalled the hurricane-lamp, largely used in railwaycars at the presenttime.

Figure 1 represents a vertical central section through the burner,chimney, and adjacent portion of the supportingshell of the lamp. Fig. 2is a view in perspective of the cone or cap and its interior shield whenremoved from the burner.

Referring to Fig. 1, the gas-supply pipe is indicated at A and the burner-tip by a, said tip being constructed in the usual manner, with anumber of perforations in its annular top. The vertical portion of thegas-pipe is inclosed by a supportiugcasing B, impcrforate, in proximityto the burner, but having a lateral tube or pipe I), which may inclosethe horizontal arm of the gas-pipe, and through which air is admitted,as indicated by the arrow, through an opening sufficiently remotefromthe burner proper to preventany lateral currents in its vicinity, theair merely flowing in a steady stream in one direction through thehollow casing. The top of the casing Bis provided with anoutwardlyflaring mouth, as indicated at E, which receives and supports acorrespondinglyformed tubularshell l-I, fitting removably but snuglywithin, so as to make a practically tight joint against the admission ofair. A cap G surrounds the burner-tip a, and is provided with a downwardly-depending tubular wire-gauze shield h, which incloses the sidesof the burner-tip and fits snugly around its base. A horizontal flange Iis formed around the lower end of the cap G and extends outward to theinner side of the shell H, to which it is brazed or otherwise suitablysecured by a tight joint all around its circumference. A series of smallholes f is formed within this flange in close proximity to the line fromwhich the wall of the cap G projects upward.

Upon the top of the flange I and outside of the circle of holes fissecured the chimneygaliery D, which consists of an imperforate metalshield whose cross-section is somewhat U-shaped, as shown, the outerleg, however, being of greater height than the inner one d, which isbent inward at a right angle and forms a close joint with the exteriorsurface of the cap G, preferably at a little less than half the heightofthe latter from its base. Perforations e are formed in thisinwardlyprojecting portion of the U-shaped shell, said perforationspreferably corresponding in number with the perforationsf in the flangeI of the cap.

In addition to securing the chimn ey-gallery at its base to the flangeI, I prefer (for the sake of symmetry as well as strength) to furthersecure it by means of an inwardly-projecting inclined flange F, formedat the top of the shell II, said flange being brazed or otherwisesecured to the exterior of the chimney'gallery I).

The chimney C may be of the form shown or any other form adapted for usein connec tion with this class of burners, and its base fits snuglywithin the annular trough of the chimney-gallery D, as shown, forming apractically tight joint against the admission of air-currents.

As above stated, the only aperture for the admission of air is at aremote point, and in using this word I merely mean to designate apointso far removed from the vicinity of the burner proper as that theair when admitted shallby the time it reaches the burner be flowingforward in a comparatively steady stream and without lateral currents.

By reference to the drawings and the arrows, which indicate the flow atthe burner, it will be seen that the greater portion of the air enterswithin the cap G, and after pass- 1ng through the Wire-gauze shieldimpinges against the flame from the outside in a steadystream. Theburner-tip a being hollow or annular, a certain portion of air of coursepasses up the central opening. A smaller portion also passes through theholes f in the flange of the cap G, and thence, after passing a secondseries of holes e, is carried upward and projected against the flame bythe converging sides of the chimney (3. It will thus be observed that noair is admitted from the exterior at any point in proximity to theburner proper, and hence no matter how much disturbance may there existthe light will be unaffected thereby, as all the air-supply is fromwithin the casing B and the distribution in the proper quantities iseffected by the internal arrangement of the parts adjacent to theburner.

As the shell H is removably fitted within the outwardly-flaring top 6 ofthe supportingcasing, convenient access can be had to the interior ofthe burner for any desired purpose Without removing the chimney from itstrough or seat in the gallery,

Having thus described my invention, I claim The combination, with theburner-tip, of the supporting-casing imperforate in the vicinity of saidtip and provided with a remote air-inlet, the flanged cap having aninternal Wire-gauze shield fitting snugly around the burner-tip, theclosed chimney-gallery mounted upon the flange of said cap, said flangeand the internal portion of said chimney-gallery being provided withperforations within the line of contact between the gallery and theflange, the chimney fitting snugly in said gallery, and the annularshell supporting said cap and fitting snugly but removably within thetop of the supporting-casing, as set forth.

WM. DAWSON.

Witnesses:

J AMES H. BELL, E. REESE.

